What is occupational health?
The WHO places occupational health within the broader category of public health and assigns it three objectives: maintaining and promoting health and the ability to work; improving working conditions and the environment to promote safety and health; and developing a healthy work organization and culture. This perspective does not define health as simply the absence of injury or disease. It includes physical, mental, and social well-being and the ability to perform work without avoidable impairment.
Occupational health combines knowledge from occupational medicine, safety, industrial hygiene , ergonomics , psychosocial factors, epidemiology, and management. Its approach is twofold: each individual needs appropriate protection and adaptation, while the organization must learn from exposures and collective harm to prevent them across the entire workforce.
Differences with related concepts
- Occupational safety and health (OSH). Broad framework of rights, policies and management to prevent injuries and ill health; occupational health is its health dimension and promotion of well-being.
- Occupational risk prevention. A set of activities and measures adopted at all stages of a company to avoid or reduce risks. It is the central legal and organizational framework for protection in Spain.
- Health surveillance. A specific preventive activity that monitors the relationship between exposure and health status, with guarantees of confidentiality and proportionality. It is not equivalent to all occupational health services.
- Workplace health promotion . Actions that encourage healthy habits and environments; they complement, but never replace, the elimination and control of occupational risks.
What determines health at work
Physical, chemical, and biological agents, safety conditions, ergonomics, work schedules, mental workload , labor relations, and organizational structure all play a role. Personal, social, and environmental characteristics also contribute, but recognizing this interaction does not absolve companies of their responsibility to control workplace exposures.
Potential harms include accidents, occupational diseases, and other work-related illnesses, such as certain musculoskeletal disorders, respiratory problems, hearing loss, skin conditions, and psychosocial consequences. Some appear immediately; others develop after cumulative exposure. Therefore, exposure history, time-based monitoring, and collective analysis are essential, as is providing support for particularly vulnerable individuals.
How it is managed
Management begins with understanding processes, job roles, and the exposed population. Next, hazards are identified, risks are assessed, measures are implemented according to the preventive hierarchy, and their effectiveness is verified. Health surveillance is designed based on risks, not as a generic assessment disconnected from the job. Individual results are confidential; the company receives preventive conclusions regarding fitness and the need to improve measures, not diagnoses that are not relevant to it.
The system must address emergencies, first aid, rehabilitation and return to work , interdisciplinary coordination, staff consultation, and review following damage or changes. Useful indicators combine exposures, compliance with measures, incidents, damages, participation, and response capacity; counting only accidents masks slow-developing illnesses and emerging problems.
Principles of an effective intervention
- Prevention is key. Eliminate hazards and control risks at the source before relying on individual equipment or behaviors.
- Adapt the work to the person. Consider job design, pace, diversity, and changes in ability.
- Integrate disciplines. Relate technical, organizational, and health data to avoid fragmented diagnoses.
- Protect confidentiality. Process health data only for legitimate purposes, with restricted access and legal safeguards.
- Participate. Include the experience of workers in diagnosis, measurement, and follow-up.
- Continuously improve. Review after changes, damage, new evidence, or insufficient results.
These rules allow occupational health to be a real preventive function and not a succession of isolated campaigns.
Practical example
At a packaging plant, shoulder discomfort, skin irritation, and fatigue are appearing at the end of the shift. The occupational health team cross-references ergonomic and chemical assessments, workstation observations, and collective monitoring results. They identify repetitive reaching, use of gloves incompatible with the product, and insufficient breaks.
The company redesigns table heights, automates some movements, replaces products where feasible, selects compatible protective equipment, and reorganizes breaks and shift rotations. The health service monitors affected individuals without disclosing diagnoses to operational managers. Exposure, additional symptoms, compliance, and process functionality are reviewed after six months. The intervention integrates technical, organizational, and health aspects.
Regulatory framework
In Spain, Article 14 of Law 31/1995 recognizes the right to effective protection and establishes the corresponding employer obligation. Articles 15 and 16 mandate the application of preventive action principles, risk assessment, and integration into planning; Article 22 regulates health surveillance, which is generally voluntary with justified exceptions, proportionality, respect for privacy, and confidentiality. Royal Decree 39/1997 organizes the disciplines and functions of prevention services.
At the international level, ILO Convention No. 155 establishes a framework for preventing work-related accidents and illnesses. Since 2022, the ILO has recognized a safe and healthy working environment as a fundamental principle and right. The WHO Healthy Workplaces model complements this framework with a public health perspective and a focus on continuous improvement.
